pkgs: add volantes-cursors

pkgs/default.nix

@@ -18,6 +18,8 @@ rec {
 
   vimix-cursors = pkgs.callPackage ./vimix-cursors { };
 
+  volantes-cursors = pkgs.callPackage ./volantes-cursors { };
+
   unbound-zones-adblock = pkgs.callPackage ./unbound-zones-adblock {
     inherit unified-hosts-lists;
   };

pkgs/volantes-cursors/default.nix

@@ -0,0 +1,44 @@
+{ fetchFromGitHub, inkscape, lib, stdenvNoCC, xcursorgen }:
+stdenvNoCC.mkDerivation rec {
+  pname = "volantes-cursors";
+  version = "unstable-2020-06-06";
+
+  src = fetchFromGitHub {
+    owner = "varlesh";
+    repo = pname;
+    rev = "d1d290ff42cc4fa643716551bd0b02582b90fd2f";
+    sha256 = "sha256-irMN/enoo90nYLfvSOScZoYdvhZKvqqp+grZB2BQD9o=";
+  };
+
+  nativeBuildInputs = [
+    inkscape
+    xcursorgen
+  ];
+
+  postPatch = ''
+    patchShebangs .
+    # The script tries to build in its source directory...
+    substituteInPlace build.sh --replace \
+      ': "''${BUILD_DIR:="$SCRIPT_DIR"/build}"' \
+      "BUILD_DIR=$(pwd)/build"
+    substituteInPlace build.sh --replace \
+      ': "''${OUT_DIR:="$SCRIPT_DIR"/dist}"' \
+      "OUT_DIR=$(pwd)/dist"
+  '';
+
+  buildPhase = ''
+    HOME="$NIX_BUILD_ROOT" ./build.sh
+  '';
+
+  installPhase = ''
+    make install PREFIX= DESTDIR=$out/
+  '';
+
+  meta = with lib; {
+    description = "Classic cursor with a flying style";
+    homepage = "https://github.com/varlesh/volantes-cursors";
+    license = licenses.gpl2Only;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ ambroisie ];
+  };
+}